Bumper-post for railway-service.



J. F. OCONNOR.

BUMPER POST EOE RAILWAY SERVICE.

APPLICATION FILED SEPT. 13, 1912.

Patented Aug. 12, 1913.

2 SHEETS-SHEET 1.

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J. F. OGONNOR.

BUMPER POST FR RAILWAY SERVICE.

.APPLICATION FILED SEPT. 13, 1912.

Patented Aug. 12, 1913.

2 SHEETS-SHEET 2.

TINTTEE STATES PATENT OFFTQE.

JOHN F. OCONNOR, OF CHICAGO, ILLINOIS, ASSIGNOR TO WILLIAM H. MINER, OF CHICAGO, ILLINOIS.

BUMPER-POST FOR RAILWAY-SERVICE.

Specification of Letters Patent.

Patented Aug. 12,1913.

To all whom t may concern:

Be it kno-wn that I, JOHN F. OCoNNom a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a cert-ain new and useful Improvement in Bumper-Posts for Railway-Service, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specication.

My invention relates to improvements in bumper posts for railway service.

rlhe object of my invention is to provide an efficient and durable bumper post, and one which will perform its service without injury to cars or other railway equipment.

In the accompanying drawings forming a part of this specification, Figure l is a front elevation partly in transverse section of a bumper post embodying my invention. Fig. 2 is a side elevation thereof. Fig. 3 is an elevation view partly in vertical section of the shock-absorbing member. Fig. 4 is a front elevation of the shock-absorbing member, partly in transverse section on line 1 -f1 of Fig. 3, and Fig. 5 is a cross section on line 5-5 of Fig. 3.

Referring to the drawings, 6 represents abumper post frame adapted to be secured at the end of a railroad track, or between the rails thereof.

7, 7 are the rails of a railroad track.

The frame 6 is provided with a base consisting of the two parallel members 8, 8, preferably channel beams.

9, 9 are front legs which extend from the forward end of base channels to top of post.

10, 10 are lateral plates connecting the base members 8, 8 and the front legs 9, 9 with the member 11, preferably a channel beam which forms the top and rear end of the post and joins the two sides of the structure.

111, 14 are rivets joining the parts of the structure.

I prefer to provide a comparatively large base for the frame and to curve the front legs thereof forwardly, as illustrated at numeral 15 in Fig. 2.

The legs of the frame are of a suitable height to permit of mounting between them and within the forwardly open recess 16 in the frame and parallel to the railroad track upon which the bumper post may be employed, the shock-absorbing member 17 at a height coincident with that of the coupler of a railway car. The shock-absorbing member has a spring case 13 laterally provided with the flanges 19, 19, which are suitably bolted to the sides of the post. The spring case 1S contains the coil springs 20, 20, preferably four in number. The sides of the spring case conform substantially to the outer contour of the assembled springs, as illustrated in Fig. 5. The spring case is closed at its rear end by the preferably integral plate 21, and open at its forward end. Around its forward end is provided the outwardly extended flange 22. T he friction shell 23 is preferably a hollow cylinder in Shape, open at either end, and provided with an internal friction face 24. At its rear end the friction shell is provided with the circumferentially outwardly extended flange 25, suitably provided with perforations registering with similar perforations in the flange 22 of the spring case to permit the passage of the bolts 2G employed to secure the friction shell to the spring case.

In preferable construction the rear face of the Hangs 22 of the spring case is substantially flush with the front faces of the forward legs of the frame, and is bolted thereto by means of bolts 27. The friction shell projects forwardly therefrom. It is also preferable to further secure the friction shock-absorbing member by the U-shaped strap 28 riveted to the frame at its ends 29, 29, and encircling the friction shell at its other end. IVithin the friction shell 23 is the spring 30 seated at its rear end against the movable spring seat or plate 31, and at its forward end against the shoulders 32 with which the annularly arranged segmental friction shoes 33 are provided. The friction shoes are preferably three in number, and are each outwardly provided with an external friction face 311-. The inner surface of each is provided with the wedging face 35 between which and the adjacent wedging face 36 of the wedge 37 is disposed an ant-ifriction roller 38. The wedge is of a general pyramidal shape and provided with wedging faces equal in number to the number of friction slices, and having at its forward end an enlarged head or buffer 39. Forwardly the wedge is provided with a central recess 40 to receive the head 41 of the connecting rod 42 which extends through member limits the compression of the spring A by engagement with the rear ends 49 of the friction shoes. The springs 20, 20 are seated at their forward ends against the rear face 50 vof the movable spring seat 3l, and at their rear ends against the rear end of the spring case.

I claim:

l. A bumper post comprising a frame to receive a shock-absorbing member, a shockabsorbing member secured to the said frame, the said shock-absorbing member comprising a spring case and springs within the case, a friction shell secured to said spring case', friction shoes and wedge, and a spring within the shell, a movable spring seat between the said spring and the springs within the spring case, the said movable spring seat being provided with a forwardly eX- tended ring to engage the friction shoes on compressing movement and limit the compression of the spring within the friction shell.

2. In a device of the character described, a shock absorbing member comprising a shell,

friction shoes and springs Within the shell, a wedge engaging the frictionshoes, lthe said wedge having a head adapted to engage the front end of the shell and limit the compressing movement of the friction shoes and springs wit-hin the shell.

3. A shock absorbing device comprising a spring case, springs within the spring case, a friction shell secured to the spring case, friction shoes and wedge and spring within the shell, a movable spring seat engaging said spring at one end, and having a forwardly projecting member' adapted to engage the friction shoes on compressing movement, and limit the compression of sai spring.

4. In a shock absorbing device, a spring case and a friction shell connected thereto, springs within the spring case, friction shoes, a wedge and spring within the shell, a movable spring seat between the springs within the spring case and the spring within the shell, said spring seat being provided with a forwardly projecting member to engage the friction shoes on compressing movement, and limit the compression of the spring within the shell, the wedge being provided with a head to engage the shell on compressing movement, and to limit the movement of the parts within the shell.

JOI-IN F. OGONNOR. Witnesses:

JOHN A. MARTINKUS, ELEANOR L. NASH.

Copies of this patent may be obtained. for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

